
In a mixing bowl, combine the softened cream cheese, lemon zest, and fresh dill.
Season with a pinch of black pepper.
Mix until the ingredients are well incorporated, and the mixture is smooth and creamy.
Lay out a piece of plastic wrap on your work surface.
Place a slice of smoked salmon on the plastic wrap.
Spread a generous amount of the cream cheese mixture evenly over the salmon slice.
Roll the salmon into a tight cylinder, encasing the cream cheese.
Repeat this process with the remaining salmon slices.
Chill the rolls in the refrigerator for about 30 minutes to firm them up.
In a small bowl, combine the finely diced red onion and capers.
Toss with a splash of lemon juice and a pinch of sea salt.
Thinly slice the cucumber into rounds.
Preheat your oven to 350°F (175°C).
Arrange the baguette slices on a baking sheet and toast them until they are golden brown and crisp.
Remove the salmon rolls from the refrigerator.
Unwrap them from the plastic wrap and slice them into bite-sized pieces.
Top each toasted baguette slice with a cucumber round, a piece of salmon roll, and a spoonful of the red onion-caper mixture.
Garnish with a sprig of fresh dill.
Arrange the finished appetizers on a platter and serve immediately.